:100225855(2006)0220010203:(1969-),,,,,,(,710032)DN400;;;:TH134:AHigh2pressureprefillvalveswithtestingONorOFFDUXue2bin,HANBing2tao,YANGDa2xiang,WEILing2yun(XianHeavyMachineryResearchInstitute,Xian710032,China)Abstract:Theprinciple,structurecharacteristicandtechniqueparameteroftheDN400high2pres2sureprefillvalveswithtestingONorOFFwasintroducedindetail.Itprovidesbasistodesignedhy2draulicsystemofgood2sizedextrusionmachine.Keywords:bigorifice;highpressure;withtestingONorOFF;prefillvalves1(),,,,,,,,DN250,,,DN4002(),,,,,,,,113DN400(2),,,,,,,,,01200621121314151612DN400,,,,,,,,400mm,,,,,,,3115MPa411DN400mmPN3115MPaPN0114MPaPN103115MPa532(1)2,,1121314151617181911011111211311411513,12,,,,,(2),,,,12,,,,6,,1120062240MN100MN125MN(mm)126019602260(mm/s)5550122001220(mm/s)250/180280/200280/200(mm)400400400()133(m/s)2148/11792124/1162198/2113(3),12,,,62,,,6,3m/s,,ZL03218842101.M.:,2006.(:2006103106)11200210,,,,,,321,16,ISBN7-111-10333-5,138/212002500,,,ISBN7211121265624,118/31200520052005,,:ISBN7211121339924,136/412002,,,,,1200,16,ISBN7-111-08742-9,76100/512000,,,,990,16,ISBN7-5021-2903-0,98100/10%,3,:110025,:0242256537802120062